# CathSource vs Cardiac CT Appropriate Use Criteria

The clearest difference is iOS requirement: Cardiac CT Appropriate Use Criteria at 6.0 against CathSource's 18.5. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CathSource ships an update every 2 months, Cardiac CT Appropriate Use Criteria every 3 months. Both last shipped on November 1, 2026.

## The numbers

| Metric | CathSource | Cardiac CT Appropriate Use Criteria |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.6 (24 ratings)](https://appshunter.io/ios/app/cathsource/id420847275/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Paid | — |
| Size | 79 MB | 2 MB |
| Requires iOS | 18.5 | **6.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | +17 |
| Developer | [ECGsource LLC](https://appshunter.io/developer/377139096) | [ferrazza](https://appshunter.io/developer/478668311) |

## What reviewers say

### CathSource

[App page](https://appshunter.io/ios/app/cathsource/id420847275)

A comprehensive medical reference focused on cardiac catheterization and angiography. It offers a searchable index of specialized topics, a database of videos of common and rare findings, and a collection of images including hemodynamic formulas and tables.

**Highlights:** Searchable index of cardiac catheterization topics, Database of coronary angiogram, ventriculogram, and aortogram videos, Image database with hemodynamic formulas and tables, Covers common and rare cardiovascular pathologies, Developed by practicing Interventional Cardiologists

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Cardiac CT Appropriate Use Criteria

[App page](https://appshunter.io/ios/app/cardiac-ct-appropriate-use-criteria/id1001189358)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CathSource free?

CathSource is free to download, with no in-app purchases.

### Is Cardiac CT Appropriate Use Criteria free?

Cardiac CT Appropriate Use Criteria is free to download, with no in-app purchases.

### Do CathSource or Cardiac CT Appropriate Use Criteria have ads?

Neither CathSource nor Cardiac CT Appropriate Use Criteria shows ads.

### Which is updated more often, CathSource or Cardiac CT Appropriate Use Criteria?

CathSource ships an update every 2 months, and Cardiac CT Appropriate Use Criteria every 3 months. Most recently, CathSource was updated on November 1, 2026 and Cardiac CT Appropriate Use Criteria on November 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*